1 /* -*- c-file-style: "linux" -*-
3 Copyright (C) 1996-2000 by Andrew Tridgell
4 Copyright (C) Paul Mackerras 1996
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 extern int delete_mode;
26 extern int delete_after;
27 extern int max_delete;
28 extern int csum_length;
29 extern struct stats stats;
32 extern int relative_paths;
33 extern int preserve_hard_links;
34 extern int preserve_perms;
35 extern int cvs_exclude;
38 extern char *compare_dest;
39 extern int make_backups;
40 extern int do_progress;
41 extern char *backup_dir;
42 extern char *backup_suffix;
43 extern int backup_suffix_len;
44 extern int cleanup_got_literal;
46 extern int ignore_errors;
47 extern int orig_umask;
49 static void delete_one(char *fn, int is_dir)
52 if (robust_unlink(fn) != 0) {
53 rprintf(FERROR, "delete_one: unlink %s failed: %s\n",
54 full_fname(fn), strerror(errno));
56 rprintf(FINFO, "deleting %s\n", fn);
59 if (do_rmdir(fn) != 0) {
60 if (errno != ENOTEMPTY && errno != EEXIST) {
61 rprintf(FERROR, "delete_one: rmdir %s failed: %s\n",
62 full_fname(fn), strerror(errno));
65 rprintf(FINFO, "deleting directory %s\n", fn);
71 static int is_backup_file(char *fn)
73 int k = strlen(fn) - backup_suffix_len;
74 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
78 /* This deletes any files on the receiving side that are not present
79 * on the sending side. */
80 void delete_files(struct file_list *flist)
82 struct file_list *local_file_list;
84 char *argv[1], fbuf[MAXPATHLEN];
85 static int deletion_count;
90 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
91 rprintf(FINFO,"IO error encountered - skipping file deletion\n");
95 for (j = 0; j < flist->count; j++) {
96 if (!(flist->files[j]->flags & FLAG_TOP_DIR)
97 || !S_ISDIR(flist->files[j]->mode))
100 argv[0] = f_name_to(flist->files[j], fbuf);
102 if (!(local_file_list = send_file_list(-1, 1, argv)))
106 rprintf(FINFO, "deleting in %s\n", fbuf);
108 for (i = local_file_list->count-1; i >= 0; i--) {
109 if (max_delete && deletion_count > max_delete)
111 if (!local_file_list->files[i]->basename)
113 if (flist_find(flist,local_file_list->files[i]) < 0) {
114 char *f = f_name(local_file_list->files[i]);
115 if (make_backups && (backup_dir || !is_backup_file(f))) {
116 (void) make_backup(f);
118 rprintf(FINFO, "deleting %s\n", f);
120 int mode = local_file_list->files[i]->mode;
121 delete_one(f, S_ISDIR(mode) != 0);
126 flist_free(local_file_list);
132 * get_tmpname() - create a tmp filename for a given filename
134 * If a tmpdir is defined, use that as the directory to
135 * put it in. Otherwise, the tmp filename is in the same
136 * directory as the given name. Note that there may be no
137 * directory at all in the given name!
139 * The tmp filename is basically the given filename with a
140 * dot prepended, and .XXXXXX appended (for mkstemp() to
141 * put its unique gunk in). Take care to not exceed
142 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
143 * the basename basically becomes 8 chars longer. In that
144 * case, the original name is shortened sufficiently to
147 * Of course, there's no real reason for the tmp name to
148 * look like the original, except to satisfy us humans.
149 * As long as it's unique, rsync will work.
152 static int get_tmpname(char *fnametmp, char *fname)
159 /* Note: this can't overflow, so the return value is safe */
160 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
161 fnametmp[length++] = '/';
162 fnametmp[length] = '\0'; /* always NULL terminated */
165 if ((f = strrchr(fname, '/')) != NULL) {
169 /* copy up to and including the slash */
170 strlcpy(fnametmp, fname, length + 1);
174 fnametmp[length++] = '.';
175 fnametmp[length] = '\0'; /* always NULL terminated */
177 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
180 rprintf(FERROR, "temporary filename too long: %s\n", fname);
185 strlcpy(fnametmp + length, f, maxname);
186 strcat(fnametmp + length, ".XXXXXX");
192 static int receive_data(int f_in,struct map_struct *mapbuf,int fd,char *fname,
196 struct sum_struct sum;
201 static char file_sum1[MD4_SUM_LENGTH];
202 static char file_sum2[MD4_SUM_LENGTH];
205 read_sum_head(f_in, &sum);
209 while ((i = recv_token(f_in, &data)) != 0) {
211 show_progress(offset, total_size);
215 rprintf(FINFO,"data recv %d at %.0f\n",
219 stats.literal_data += i;
220 cleanup_got_literal = 1;
224 if (fd != -1 && write_file(fd,data,i) != i) {
225 rprintf(FERROR, "write failed on %s: %s\n",
226 full_fname(fname), strerror(errno));
227 exit_cleanup(RERR_FILEIO);
234 offset2 = i*(OFF_T)sum.blength;
236 if (i == (int) sum.count-1 && sum.remainder != 0)
239 stats.matched_data += len;
242 rprintf(FINFO,"chunk[%d] of size %d at %.0f offset=%.0f\n",
243 i,len,(double)offset2,(double)offset);
246 map = map_ptr(mapbuf,offset2,len);
252 if (fd != -1 && write_file(fd,map,len) != (int) len) {
253 rprintf(FERROR, "write failed on %s: %s\n",
254 full_fname(fname), strerror(errno));
255 exit_cleanup(RERR_FILEIO);
260 flush_write_file(fd);
263 end_progress(total_size);
265 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
266 rprintf(FERROR, "write failed on %s: %s\n",
267 full_fname(fname), strerror(errno));
268 exit_cleanup(RERR_FILEIO);
273 read_buf(f_in,file_sum2,MD4_SUM_LENGTH);
275 rprintf(FINFO,"got file_sum\n");
277 if (fd != -1 && memcmp(file_sum1,file_sum2,MD4_SUM_LENGTH) != 0) {
285 * main routine for receiver process.
287 * Receiver process runs on the same host as the generator process. */
288 int recv_files(int f_in,struct file_list *flist,char *local_name)
292 char *fname, fbuf[MAXPATHLEN];
293 char template[MAXPATHLEN];
294 char fnametmp[MAXPATHLEN];
296 char fnamecmpbuf[MAXPATHLEN];
297 struct map_struct *mapbuf;
299 struct file_struct *file;
302 struct stats initial_stats;
305 rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
308 if (flist->hlink_pool) {
309 pool_destroy(flist->hlink_pool);
310 flist->hlink_pool = NULL;
320 csum_length = SUM_LENGTH;
322 rprintf(FINFO,"recv_files phase=%d\n",phase);
323 send_msg(MSG_DONE, "", 0);
329 if (i < 0 || i >= flist->count) {
330 rprintf(FERROR,"Invalid file index %d in recv_files (count=%d)\n",
332 exit_cleanup(RERR_PROTOCOL);
335 file = flist->files[i];
337 stats.current_file_index = i;
338 stats.num_transferred_files++;
339 stats.total_transferred_size += file->length;
340 cleanup_got_literal = 0;
345 fname = f_name_to(file, fbuf);
348 if (!am_server && verbose) { /* log transfer */
349 rprintf(FINFO, "%s\n", fname);
354 initial_stats = stats;
357 rprintf(FINFO,"recv_files(%s)\n",fname);
362 fd1 = do_open(fnamecmp, O_RDONLY, 0);
364 if (fd1 == -1 && compare_dest != NULL) {
365 /* try the file at compare_dest instead */
366 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
367 compare_dest, fname);
368 fnamecmp = fnamecmpbuf;
369 fd1 = do_open(fnamecmp, O_RDONLY, 0);
372 if (fd1 != -1 && do_fstat(fd1,&st) != 0) {
373 rprintf(FERROR, "fstat %s failed: %s\n",
374 full_fname(fnamecmp), strerror(errno));
375 receive_data(f_in,NULL,-1,NULL,file->length);
380 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
381 /* this special handling for directories
382 * wouldn't be necessary if robust_rename()
383 * and the underlying robust_unlink could cope
386 rprintf(FERROR,"recv_files: %s is a directory\n",
387 full_fname(fnamecmp));
388 receive_data(f_in, NULL, -1, NULL, file->length);
393 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
399 if (fd1 != -1 && !preserve_perms) {
400 /* if the file exists already and we aren't preserving
401 * permissions then act as though the remote end sent
402 * us the file permissions we already have */
403 file->mode = st.st_mode;
406 if (fd1 != -1 && st.st_size > 0) {
407 mapbuf = map_file(fd1,st.st_size);
409 rprintf(FINFO,"recv mapped %s of size %.0f\n",fnamecmp,(double)st.st_size);
413 if (!get_tmpname(fnametmp,fname)) {
414 if (mapbuf) unmap_file(mapbuf);
415 if (fd1 != -1) close(fd1);
419 strlcpy(template, fnametmp, sizeof template);
421 /* we initially set the perms without the
422 * setuid/setgid bits to ensure that there is no race
423 * condition. They are then correctly updated after
424 * the lchown. Thanks to snabb@epipe.fi for pointing
425 * this out. We also set it initially without group
426 * access because of a similar race condition. */
427 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
429 /* in most cases parent directories will already exist
430 * because their information should have been previously
431 * transferred, but that may not be the case with -R */
432 if (fd2 == -1 && relative_paths && errno == ENOENT &&
433 create_directory_path(fnametmp, orig_umask) == 0) {
434 strlcpy(fnametmp, template, sizeof fnametmp);
435 fd2 = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
438 rprintf(FERROR, "mkstemp %s failed: %s\n",
439 full_fname(fnametmp), strerror(errno));
440 receive_data(f_in,mapbuf,-1,NULL,file->length);
441 if (mapbuf) unmap_file(mapbuf);
442 if (fd1 != -1) close(fd1);
446 cleanup_set(fnametmp, fname, file, mapbuf, fd1, fd2);
448 if (!am_server && verbose) { /* log transfer */
449 rprintf(FINFO, "%s\n", fname);
453 recv_ok = receive_data(f_in,mapbuf,fd2,fname,file->length);
455 log_recv(file, &initial_stats);
457 if (mapbuf) unmap_file(mapbuf);
461 if (close(fd2) < 0) {
462 rprintf(FERROR, "close failed on %s: %s\n",
463 full_fname(fnametmp), strerror(errno));
464 exit_cleanup(RERR_FILEIO);
468 rprintf(FINFO,"renaming %s to %s\n",fnametmp,fname);
470 finish_transfer(fname, fnametmp, file);
475 if (csum_length == SUM_LENGTH) {
476 rprintf(FERROR,"ERROR: file corruption in %s. File changed during transfer?\n",
481 rprintf(FINFO,"redoing %s(%d)\n",fname,i);
483 send_msg(MSG_REDO, buf, 4);
488 if (delete_after && recurse && delete_mode && !local_name
493 rprintf(FINFO,"recv_files finished\n");